Locomotive boiler



Feb. 16 1.926. Y 1

c. G. HAwLEY LocoMoTIvE BOILER .f

Filed May 15, 1922 llll-lllllllllll.

Patented Feb. 15, 192.55.

Unirse sra CHARLES GILBERT rinwLnY, or cHreAGo, ILLINors, AssrGNoR ToyLoicolvio'rrvn FIRE- i, BOX COMIANY, 0F cHrCAGO, ILLINOIS, ACORrORATIoN 0F DELAWARE.

LocoMoTrvn borran.

Application-filed May13,`1922. Serial No. 560,654.

T 0 all whom zimag/ concer/a.' y ,w

Be 1t, known that I, CHARLES GiLBERT I-IAwLEY, a citizen of .the UnitedStates, and a resident of Chicago, Cook County,Illi-y noisy, haveinvented certain new and' useful Improvements in and forLocomotive-Boilers, of which the following is a specification.

My invention relates to `improvements in locomotive boilers, withparticular reference to improvements in the internal fireboxes thereof.The object of the invention is'to improve 'the steaming capacity and theeffii ciency of locomotive boilers.' To this end I equip the same withlwater-steaming-andcirculating walls, which occupy the iirebox of theboiler, and which accomplish the same purposes and perform the samefunctions as do the well known Nicholson thermic siphons, with someimprovements. lAs will presently appear, my invention'comprises lalocomotive boiler lirebon withits mud or foundationY ring in combinationwith one or more substantially triangular water-,'steaming-and-circulatingV .walls, which I erect between said' mudring' and the crown sheet of the lireboX and each of'whicli at its lowerend isV in direct communication with the throat of the boiler, while itstop opens freely through the crown sheet of the lirebo. The details 0fmy invention will be clearly comprehended on reference totheAaccompanying drawings, in which Fig. 1 Vis a -rvertical longitudinalsection of alocomotive boiler firebox embodying my invention; Fig. 2 isa transverse Yvertical section'thereof onV the line-2--2 of Fig. 1, andFig. 3 is a combined plan view and horizontal section Yof the fireboXAont-he line 3'-3 of F ig. 2. K

The firebox 1 here shown is of the combustion chamber type..` Myinvention, by a Y slight modification in `the* shape of thewater-steaming-and-circulating wall, is quite as well adapted to.lireboxes of the straight g flue-sheet type. yThe crownsheet of thelireboX is marked 2, the back sheet, 3, the side sheets 4:, 1, and thethroatY sheet 5, andthe mud or'foundation ring is marked They throatsheet-5 may also be taxen as repre.

senting the lower part ofa plain flue-sheet. The part marked? willV berecognized as the Vbarrel ofthe locomotive boiler and the part marked 8as the wrapper orV shell of thefirebox. Between Vthe flreboX and thewrapper are the following waterY spaces or legs,

VThe latter -contains the fueldoor 12.

yextended portion W" of the wall.

is ofthe wide type. yI have selected this as the more common type,'butit will be uni derstood that my invention is also applicable teiireboxes of' the narrow7 type kand vto iireboxes of the eXtra widetypes, the only difference being inthe number of vertical water walls orsemi-partitions employed.

- The water wall W referred to lmay be formed from a single sheet ofiireboX plate, folded upon itself aft-er the manner followed inA makingthe Nicholson thermic; Siphon; or it may be formed from two rsheets VV,W', the edges of whiclifare flanged'and welded together, as indicated atpoints W2 in Fig. 3. These sides or sheets YV are spaced vapart to formvthe water spaces W3 and are connected by many closely spacedstay-bolts, IW. In side-'elevation the `water wall has a generallytriangular form or shape. `The triangle,-obviously, is inverted,ypresenting its base, 75, to thecrown sheet 12,*whileits1apeX ispresented virtually atv n the mud ring 6. 'W7 represents the closedbottom of the vwall IY, `the same being inclined upwardly and'rearwardly Yfrom the mud ring to a juncture' withthe crown sheet 2.-,Theforward edge,-or closed end, Ws of thewall W, starts at a point 5" onthe throat 5, considerably above the vmud ringe. From' thatv point theedge curvesv backwardlyl and upwardly and finally merges with the Vcrownff sheet 2 at the point 2. f It is possible to have the' bottom line W7start directlyV 1 at the f mud ring' and extend thence to the. crownsheet, but bynpreference I providethe mud vring'witb a tongueorvexltension 6", which constitutes a separate bottom'fonthe lower ratebears the reference character' 13.

' The firebox is assumed to be provided with the usual blow-oilicocks,and, in addition, a blow-oft' cock 11'is provided for each of the waterwalls, the same being placed in thev lmud ring extension 6 close to thefrear end thereof, thebetter to discharge any accumulation of sedimentwhich may lodge. in thebottom 'ofthe water wall. The parts 11,'Fig. 2,are the .operatingv stems belongV ing tothe blow-off cocks 11.

It will 'be niidr'tood that the 'lower f0.1-

vextensions or tongues, G, following usual boiler practice. rlhe upperedges lll ot' the water wall side sheets and ends are .flanged outwardlyas well shown at lVy in Fig. 3 and are autogenously welded to the edgesol pre-formed openings in the crown sheet. After being so welded thecrown stays are placed in position, those rows oi stays which areadjacent the walls being fastened in the top flange lV" thereof.

It will now be understood that the lower end ot the wall lll is in opencommunication with the throat 9 ot t-he boiler, the :tree flow ot watertherethrough being interrupted only by the presence ot the` stay-boltsnecessarily positioned therein. Likewise the upper end or top oit thewall 'W presents an open slot, WY', which appears to be in the crownsheet 2 itself, the tlange lily ot the wall having become a part of thelatter. The water wall (or walls) forms convenient supports for thelire/box arch A indicated by dotted lines in Fig. l. The arch is omittedfrom Fig. 2 tor the sake ot clearness. lVhen desired the lower lpart oithe part A ot' the arch may be vertical and the part of the grate whichis forward ot the wall A 4may be blanked oit as indicated at A2 (seeFig. 8) after the manner ot a` socalled Gaines lirebox. l"requentlj,vthis will be found desirable. The arrangemei'il is very clearly shown inFig. 3, .vherein it will also be observed that the arch is supported bylugs l5 that project Vtroni the water walls and side sheets.

To those skilled in the art it will be observed that all 'roblerns o'texpansion and contraction areA effectivelyv cared tor in this design,the projections or tongues 6 of the inud ring being` `lined onlyv at oneend are tree to move slightlT as the lower part ot the Siphon contractsor expands. rest, the vertical and longitudinal expansion of the waterwall so nearly conforms to the simultaneous expansion and contraen tionof the ren'iainder of the rebox as to occasion no trouble.

Then an intense tire is maintained in the tirebox the boiler water isheated and converted into steam upon every exposed surtace thereof,including the surfaces o't the For the water wall or walls. Inconsequence, the cooler heavier water ilows `rapidliT into the lowerpart of the water wall. tollowiiig the path ot the arrows 'in Fig. 1.rllhe i Yater being heated and much evaporated, rises rapidly and tlowsinto the upper part ot' the boiler through the open top of the wall. Itwill be observed that the opening at the top ot the wall is so muchgreater than that at the bottom as to permit a full and tree expansionot the water, so that the column ot water rising from the water wall isnot so vigorous as to objectionablvxfv penetrate the steam space orprime the steam.

`When the water level in the boiler is allowed to tall to oi' below thetopl of the crown sheet the vigorously ascending column ot water withinthe water wall -spreat s over the top of the crown sheet and thus atfords tull protection against a dangerous explosion.

Having thus described my invention, l claim as new and desire to secureby Letters Patent:

l. In combination with a locomotive boiler tireboX including a crownsheet, a throat sheet and a mud ring having a tongue extendingrearwardlyY from said throat sheet, a substantially triangular uprighttlat tubular water wall having an inlet` mouth at one end including' apart embracing said mud ring tongue vand a part opening through thethroat sheet and eommunicating with the bottom water space ot theboiler, the other end of the water wall openL ing through the crownsheet and communieatingwith the top water space ot the hoi Q.. ln cnihination with boiler boxy including a extending ,rearwardly sheet, asiibstantiall)T triangular npr.' tubular water wall having an inlet atone end including a part embracing said mud ring tongue and a partopening through the throat sheet and communicating with the bottom waterspace oi the boiler, the other end ot' the water wall opening throughthe crown sheet and communicating with the top water space ot theboiler, and a blow oil cock iositioned in the mud ring tongue andthrough which' sediment; may be discharged from' said water wall.

in testimony whereof, I have hereunto set my hand this 6th dav ot Mav,1922.

CHARLES GILBERT HAVLE Y.

